"It's down to Kevin [Feige, Marvel Studios president] and Ike [Perlmutter, CEO of Marvel Entertainment] and Disney to come to us with what the proposal is, and that's on us to agree or disagree," Downey said. "When things are going great, there's a lot of agreement."

Downey helped kick-start the Marvel Cinematic Universe with the first "Iron Man" movie back in 2008 and followed it up with two direct sequels and the superhero team-up "The Avengers." Those four movies have grossed an eye-popping $3.9 billion and made Downey the highest-paid actor in Hollywood.

While Downey is set to don the hero's armor again in "Avengers: Age of Ultron" and a third "Avengers" film, he has yet to commit to anything beyond that.

According to the EW interview, though, Downey likes being box-office champ. "It's that thing of: Why give up the belt when it feels like you can barely get jabbed?" he said, adding the caveat, "Most people are saying that right when they get knocked out."

Feige, meanwhile, was recently asked about the prospect of Downey suiting up for "Iron Man 4." He told Collider, "Anything's a possibility. Who the heck knows? We have a lot of work to go to finish 'Avengers 2.' We have a lot of work for whatever 'Avengers 3' is, that's all folks need to know. Who knows what happens after that."

In the last year, Jennifer Lawrence earned her third Oscar nomination, continued to spearhead the blockbuster "Hunger Games" franchise and helped reinvigorate the "X-Men" movie series with "Days of Future Past" -- all at the ripe old age of 23.

Early audience tracking told us that "Iron Man 3" was going to be a big hit. But until the numbers started floating through inboxes and Twitter feeds in the past week, it didn’t hit home just how big that hit would be.

Even in a summer that's focused on creativity, with exceptional documentaries like "Amy" on Amy Winehouse and "What Happened, Miss Simone?" on Nina Simone, "Listen to Me Marlon" stands out. Autobiographical in nature, unconventional in structure, this is the story of Marlon Brando not as the world...

ABC News was last in the ratings in the summer of 1968, behind NBC's team of Chet Huntley and David Brinkley and Walter Cronkite on CBS. It was desperate to gain an edge on the more established networks' news teams.